SOLUTION: one number is 1 more than twice another number. the product of the two numbers is 21. What are the numbers?

Question 211648: one number is 1 more than twice another number. the product of the two numbers is 21. What are the numbers?
Found 2 solutions by checkley77, rfer:
Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website!
x=(2y+1)
xy=21
(2y+1)*y=21
2y^2+y-21=0
(2y+7)(y-3)=0
y=3 ans
x=2*3+1
x=6+1
x=7 ans
Proof:
3*7=21

Answer by rfer(16322) (Show Source): You can put this solution on YOUR website!
3 & 7
3*7=21
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